.app {
  /*text-size-adjust: none;
  font-family: helvetica, arial, sans-serif;
  line-height: 200%;
  padding: 6px 20px 30px;
  background: #ccc;*/
}
body, * {
  padding: 0px;
  margin: 0px !important;
  font-size: 12px;
}
.header {
  height: 40px;
  line-height: 40px;
  text-align: center;
  margin: 0 auto ;
  background: #ccc;
}

.content {
  padding: 20px;
}